Currently trying to desolder a Pok3r, but I'm having a problem getting all the solder off the switches. The pump I'm using seems pretty good, so the only thing I can think of is that maybe my iron isn't hot enough to get to all the solder melted. I'm using exactly the suggested technique form instructional videos, but for some reason a small amount of solder always remains in the holes no matter how much I try to suck it out. Does anyone have any ideas as to what I can do to fix this?